This standard BS ISO 9449:2007 Tools for moulding. Centring sleeves is classified in these ICS categories:
25.120.30 Moulding equipment
This International Standard specifies the dimensions and tolerances, in millimetres, for centring sleeves intended to be used for locating the spacing blocks in relation to the fixed clamp plates in moulds.
It gives indications concerning materials and hardness, and specifies the designation of centring sleeves which meet the requirements of this International Standard.